ICSE Class 10 Physics
Question 22 of 27
Solved 2024 Specimen Paper ICSE Class 10 Physics — Question 11
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Question A radioactive nucleus X emits an alpha particle followed by two beta particles to form nucleus Y.
(a) With respect to the element X, where would you position the element Y in the periodic table?
(b) What is the general name of the element X and Y.
(c) If the atomic number of Y is 80 then what is the atomic number of X?
(a) AZX ⟶ A-4Z-2X1 + 42He ⟶ A-4Z-1X2 + 0-1e ⟶ A-4ZY + 0-1e
We can see from the above that X and Y have same atomic number. Hence, X and Y will occupy the same position in the periodic table.
(b) Isotope.
(c) When the atomic no of Y = 80 and X and Y are isotopes then atomic no. of X will also be 80.